Carbureter.



E. c. FRAM CA'HBURETER.

, APPLICATION FIL ED NOV-3..191 4-' 7 1,251,570. Patented Jan. 1, 191&

2 SHEETS-SHEET WITNESSES "INVENTOR UNITED STATES nnosair ornamnn, ornnrnorr, MICHIGAN, ASSIG1\TOR To soornrn ANONYME DU CARBUBATEURZENITH,or LYON, FRANCE, A CORPORATION or rnnncn angelic-nurse.

Specification of Letters Patent.

Patented Jan, 1918.

Application filed November 3, 1914. Serial No. 870,053.

To all whom it may concern:

Be it known that I, ENOGAT C. PR'ADLER, a citizen ofthe French Republic,residing at Detroit, in the county of VVay'ne and State of 'Michigan,have invented a new and useful Carburetor, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, forming part of this specification, in wh1ch-Figure l is a vertical longitudinal section showing oneform of myimproved carbureter.

Fig. 2 is a cross section on the line II-II of Fig. l, and Y Fig. 3 is apartial longitudinal section showing another form of the invention.

My invention relates to that type ofcarbureter wherein there are twoseparate streams of gasolene, either split from a common flow channel orconsisting of two separate supply channels. In the well known zenithtypeoi carbureter, described in the United States patent to 'Baverey,No. 907,- 953, dated December 29, 1908, these separate gasolene streamsare fed to two separatenozzles or jets. One of these flows is fed intoan atmospheric well where the suction is practically killed, so that thesuction flow to the other nozzle is compensated as it grows richerunderhigher suctions, by the flow through the well controlled. jet, which iseither practically constant or increases at less than the normal rate. I

invention is related to this general types? earbureter' and isdesignedto pro- 'videta, cheaper and simpler form whereinthe two'streams afterpassing control points are joined before they reach the jet or nozzleopening. In other words, whereas heretofore the two streams were onlyjoined in the carbureter chamber after emerging from the jets to the jetopenings, I join them before they reach the jet opening.

In this way a single jet opening is suiticient,'and a simplerconstruction is afijor'ded which also provides for supplying air throughthe center of the nozzle, if desired.

In the drawings, referring to Figs. land 2, 2 represents the usualconstant level chamber, the level in which is shown as connut 22.

trolled by the ordinary float 3 and valve 4:. I

, 5 is the inlet nozzle, and 6 the air vent above a cavity 8 where it isbranched orsplit.

One portion passes up through a micrometer'hole in a nut 9 into a well10 having in itsupper portion air vent openings 11 lead- 2 ing to theatmosphere. There may be one or more of these openings of any desirablesize. The gasolene passes from the well to a common chamber 14, whilethe other portion of gasolene from the cavity 8 leads through amicrometer hole in nut 12 to a cavity 13, which also communicates withthe jet chamber 14.

In the form shown, an air tube 15 extends up through this-cavity to thetop of the nozzle or jet tube 16, thus giving an annular or ring shapednozzle, in which the two branch flows are joined and from which they aredrawn out by the suction in the engine intake 17.

In the specific form shown the nuts Qand 12 having the micrometer holesare accessible for removal and replacing of the nuts through openingscontrolled by nuts 18 and 19; and the air tube 15 is secured to aremovable nut 20 screwed in the bottom of the casting.

The gasolene flows from the well 10 to the common chamber 14; through aconstricted opening 21, this being preferably made accessible through anopening in the outer wall or the structure, ,which is closed by a Theair entering at 23 is sucked up over the nozzle and joins with thegasolene from the two fiows fed to said annular nozzle. The ordinaryVenturi tube is shown at 24 and the usual butterfly throttle valve at25.

To provide for easy starting, I preferably providea depending feed tube26 which hangs down in the well 10 with its open lower end slightlyabovethe bottom of the well, theupper portion of thistube being securedto a bushing 27 resting onshoulders 0f the lower casting, the castingsbeing preferably joined on the line 12-42, as shown in Fig. 1. Thisbushing has a small hole 28 leading to a cavity 29 opening to theatmosphere through a hole 30 controlled by a conicalthumb screw 31, bywhich the amount of sub-atmosphere in the starting tube may beregulated. From the cavity 29 a feed channel leads into the intakepassage opposite the throttle 25 when closed.

In the operation of the device, the main gasolene flow through thechannel 7, which is of more than ample capacity to supply the totalsuction as fixed by the ring jet is split at the two flows, one passingup into the well through the regulated control orifice 9, and thencethrough control orifice 21 to the jet, while the other flow passesthrough the control opening in nut 12 into the same annular jet cavity.At rest, the gasolene will stand at the same level in the constant levelchamber, the atmospheric well, the starting tube, and the annular jet.When the throttle is slightly opened and the engine turned over, thegasolene will be sucked out of the feed tube 26, giving a richer mixturefor starting, and as the throttle is further opened the two compensatingjets will then feed the engine, the main jet supplies a mixture whichwould grow richer as the speed increases, while the well controlledbranch gives a-supply which is either constant or grows richer at lessthan the normal rate, the two feeds thus combining to give a mixturewhich is practically constant at all speeds.

In Fig. 3 I show a form similar to that of Figs. 1 and 2, except thatthe jet is a plain,

ordinary jet with no central air tube supplying air to the center of thejet opening.

In this form, similar parts are marked with similar numerals, with theprime mark ap plied thereto. In this case the common chamber 1 1' whichis in communication with the bottom of the jet tube 16 receives thegasolenethrough a constricted opening 21 from the well 10 and through anopening in a nut 12. In this case the bottom nut 20' is solid and thenut 12 is adapted to be removed through the screw threaded opening inwhich the nut 20 is seated.

Another feature of my invention, not

claimed herein, lies in the means for attaching the float to its stemwhich forms the control valve for the entry of gasolene to thefloat'chamber. The float 3 is ordinarily soldered to its needle valvestem. -As these floats necessarily vary slightly in weight and size, itis important to obtain an adjustment of the float relative to its stemin order to bring the level to the proper point,

\ loads.

neaaavo the float would require adjustment the same as in a hollowfloat. The adjustment will also serve to compensate for any inaccuratemachining or adjustment of the parts.

The advantages of my invention result from the simplicity and cheapnessof the device and the substantially constant mixture which is obtainedat varying suctions and The controlled constrictions are between thepoint of branching or splitting the flow and the point where the flowsagain unite before being drawn out of the jet. A single jet may thus beemployed, while giving the same advantages as in the usual zenith type.It will be noticed that the Venturi tube is clamped in place by the mereact of joining the upper and lower castings on the line.ab, which alsoclamps the bushing which carries the starting tube. The device is ofrelatively few parts and may be cheaply and easily made and assembled.The nuts 9 and 12 are alike and are of small size, thus being easily andcheaply made. These nuts are all preferably packed, as shown.

Many variations may be made in the form and arrangement of the partswithout de-' chamber and an atmospheric well open to the air, a commonchamber supplying the jet opening, two channels having controllingopenings leading from the constant level chambenone leading to the welland the other to the common chamber, and a -.channel having a controlopening and leadingfrom the well to the common chamber; substantially asdescribed.

2. A carbu'reter having a' constant level chamber, .a well outside ofsaid chamber and open to the atmosphere, a common chamber supplying thejet opening, twochannels having controlling openings leading from theconstant level chamber, one leading to the well and the-other to thecommon chamber, and a channel having a control opening and leading fromthe well to the common chamber; substantially as described.

3. A carbureter having an annular jet opening surrounding an air supply,said jet.

opening being arrang d to feed gasolene upwardly therethrougl. commonchamber at till the bottom of said jet opening, and a plurality ofgasolene supply channels each hav ing an independent controlcommunicating with said common chamber and arranged to continuously feedfuel thereto; substantially as describe 4. A carbureter having aconstant level chamber, a well outside of the chamber and open to theair, a common chamber feeding the jet opening, feed channels havingcontrol openings leading from the constant level chamber to the wellandthe common chamber respectively, and a channel leading from.

the well to the common chamber; substantially as described. I 1

5. A carbureter having a constant level chamber, a well outside of thechamber and open to the air, a common'chamber feeding the jet opening,feed channels having control openings leading from the constant levelchamber to thewell and the common chamber respectively, and a channelleading from the well to the common chamber, thecontrol openings beingformed in removable bushings having calibrated substantially asdescribed.

6. In a carbureter, a constant level supply chamber, acommon chamberbelow the level of the fuel. in the constant level supply chamber, asingle annular jet opening leading from the commonochamber around an airtube, and two gasolene supplies leading from the constant level supplychamber to said commonchamber, each supply having an independent 'feedcontrol device; substantially as described. f

7. A carbureter having a casing and a cover, there being a horizontaljoint between the casing and the cover, said casing having a floatchamber, an atmospheric well and an engine intake passage extendingtherethrough, the cover having an engine intake extending therethroughand in line. with the engine intake through the casing, said coverextending over the atmospheric well' and the float chamber and formingclosures therefor, and meansfor securing the cover to the casing;substantially asdescribed.

8. A carbureter having a constant level chamber, a well outside of thechamber and open to the air, a common chamber feeding the jet opening,feed channels having con-.

perforations 9. A carbureter having a constant level supply chamber, ajet opening communicating with the engine intake, an atmospheric wellcommunicating with the supply chamber, a connection leading from theatmospheric well to the engine intake, a common chamber communicatingwith the jet below the constant level of the'supply chamber, a supplychannel connected to said chamber and the supply chamber, and a secondsupply channel connected to the common chamber and the atmospheric well;substantia lly as described. h

.- 10. A carbureter comprising a float chamber, an oil feed leadingthereto, a float in said chamber for maintaining a constant levelthereinya vertical jet tube, an atmosphericwell between the jet tube andthe float chamber, a common chamber below the constant level of the oilin'thefloat chamber and communicating with the jet feed, an oil supplychannel communicating with said cominon chamber and the atmosphericwell, and i an oil supply channel communicating with the common chamberand the float chamber, said channels being arranged to constantly feedfuel during operation; substantially as described.

11. A carbureter having a constant level chamber and an atmospheric wellopen to the air, a common chamber supplying'the jet opening, twochannels having controlling.

openings leading from the constant level chamber, one leading to thewell and the other to the common chamber, and achannel having a controlopening'leading from. the well to the common. chamber, the well having asupply channelleading to the carbureting chamber at a point above thejet; substantlally as'described.

12. A carbureter having a constant level chamber and an atmospheric Wellopen to the air, a common, chamber supplying the jet opening, twochannels, having controlling openings leading from, the constant levelchamber, one leading to the well and the other to the common chamber, achannel having a control opening leading from the well to the commonchamber, and means for ad usting the size of the air opening into thewell; substantially as described.

13. In a carbureter, an air passage, a con stant level fuel, chamber, anatmospheric well open to the air, a fuel supply to said well,'an outletfrom the lower .part of the well, an L-shaped fuel supply passagecomterminating at the other end in said air passage, and an additionalfuel supply leading from the constant level chamber and discharginginto'said Lshaped passage below the normal level of the fuel,substantially as described.

14. In a carbureter, an air passage, a con- -municating at one end withsaid outlet and aeaea'm stantlevel fuel chamber an atmospheric shape&passage below thevnormal level of 10 Well open to the air, a fuel supplyto said the fuel, substantially as described. Well, a calibrated controloutlet from the In testimony whereof, I have hereunto set lower partofthe Well, an L-shaped fuel my hand.

supply passa e communicating at one end T with said outlet andterminating at the other ENOGAT PRADLER end in said air passage, and anadditional Witnesses:

fuel supply leading from the constant levelv F. D. VAN ALLEN? fuelchamber and discharging into said. B; I H. W. PROCTOR.

